C++: value semantics to concurrent systems

The course, in order

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1. Keep every C++ view inside its source lifetime

   Distinguish values, references and views, then return owned data whenever a result must outlive its source.

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2. Acquire C++ resources into immediate owners

   Represent every successful acquisition with an owner and unwind partial construction without losing the primary failure.

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3. Preserve C++ container invariants during algorithms

   Choose container operations by invalidation, ordering and exception guarantees rather than convenience.

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4. Move C++ ownership without inventing source state

   Use move operations to transfer owned resources while relying only on the moved-from type contract.

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5. Constrain a C++ generic API to what it uses

   Express the actual operations a template requires while preserving heterogeneous lookup and typed command relationships.

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6. Observe concurrent C++ work before returning

   Retain exception authority, close concurrent state explicitly and join every started task before reporting an outcome.

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7. Separate shared ownership from observation

   Use shared_ptr, weak_ptr and aliasing ownership according to lifetime authority rather than pointer shape.

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8. Rename map identity without losing its node

   Use node handles to transfer an existing allocation and restore ownership when insertion cannot commit.

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9. Make a C++ allocation budget real

   Bind polymorphic allocation to a caller-owned resource and fail instead of silently escaping a fixed budget.

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10. Parse complete C++ numeric records

    Use bounded locale-independent conversion and require complete grammar before publishing an exact number.

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11. Validate C++ calendar values before arithmetic

    Keep civil dates distinct from local instants and use chrono validity before computing an epoch offset.

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12. Decode C++ binary values without alignment assumptions

    Assemble endian-defined bits from bytes, preserve finite representations and avoid aliased or unaligned loads.

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13. Read complete C++ stream records

    Distinguish EOF, extraction failure, trailing input and exact quoted record grammar while retaining caller stream ownership.

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14. Materialize C++ range results at the boundary

    Compose lazy range operations internally and return an owned, correctly widened result across lifetime boundaries.

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15. Return explicit results from a C++ library boundary

    Translate nested failures and ordinary filesystem outcomes into an owned, documented library result.

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16. Publish and inventory C++ filesystem state

    Stage a complete file under owned paths and produce a deterministic directory inventory without following links.

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17. Wake and join stopped C++ work

    Make cooperative stop participate in blocking waits and observe every asynchronous result before scope exit.

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18. Apply C++ typed commands transactionally

    Use variant alternatives as explicit commands and commit a dependent batch only after every precondition succeeds.

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19. Read one correlated C++ state generation

    Protect related fields under one shared/exclusive lock and return a detached snapshot from a single generation.

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20. Deliver an all-or-nothing C++ import library

    Combine complete stream parsing, checked accumulation, deterministic state change and explicit failure into a reusable library operation.

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